just got a couple of the cheapest PSP 4 layer screen protectors off ebay for $2au each
they're great, except i didnt trim the first one small enough and apon removing it and trying to trim it again i got dust on the sticky silicone side (but not adhesive with these ones) and that was the end of that one.
so the second one was trimmed correctly now that i noticed a thin black strip on the left side of the 5500 lcd that i didnt notice before
got it on there ok, but got a couple of bits of dust that cause bubbles which you cant move...
so left it on, it'll do for now, so can get a feel for it, then if i like ill order some more, and this time do it in the bathroom after running the hot shower for some time to create steam and a dust free environment as recommended by someone in another thread...
peace.